Manchester symbols [7:6655]

2001-05-31 Thread g_study

What are Manchester symbols?




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Re: Manchester symbols [7:6655]

2001-05-31 Thread hal9001

Something to do with Ethernet Encoding I fink...anyone else?

Karl
- Original Message -
From: "g_study" 
To: 
Sent: Thursday, May 31, 2001 9:07 PM
Subject: Manchester symbols [7:6655]


> What are Manchester symbols?




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Re: Manchester symbols [7:6655]

2001-05-31 Thread Fred Ingham

Manchester encoding is used on 10 Mbps Ethernet, Differential Manchester
encoding is used on token ring.  

Fred.  

hal9001 wrote:
> 
> Something to do with Ethernet Encoding I fink...anyone else?
> 
> Karl
> - Original Message -
> From: "g_study"
> To:
> Sent: Thursday, May 31, 2001 9:07 PM
> Subject: Manchester symbols [7:6655]
> 
> > What are Manchester symbols?




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Re: Manchester symbols [7:6655]

2001-05-31 Thread hal9001

Thanx for that any idea about the symbols?

Karl
- Original Message -
From: "Fred Ingham" 
To: "hal9001" ; 
Sent: Thursday, May 31, 2001 11:45 AM
Subject: Re: Manchester symbols [7:6655]


> Manchester encoding is used on 10 Mbps Ethernet, Differential Manchester
> encoding is used on token ring.
>
> Fred.
>
> hal9001 wrote:
> >
> > Something to do with Ethernet Encoding I fink...anyone else?
> >
> > Karl
> > - Original Message -
> > From: "g_study"
> > To:
> > Sent: Thursday, May 31, 2001 9:07 PM
> > Subject: Manchester symbols [7:6655]
> >
> > > What are Manchester symbols?




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Re: Manchester symbols [7:6655]

2001-05-31 Thread Priscilla Oppenheimer

The original 10-Mbps Ethernet II and 802.3 standards use Manchester 
encoding for all media types. Manchester encoding specifies that a bit 
period is divided into two equal intervals and there is always a transition 
from either high to low or low to high in the middle of the bit period. A 
binary zero is high first and then low. A binary one is low first and then 
high. I haven't heard these called symbols, but perhaps your reference 
calls them symbols.

Priscilla


At 07:09 PM 5/31/01, hal9001 wrote:
>Thanx for that any idea about the symbols?
>
>Karl
>- Original Message -
>From: "Fred Ingham"
>To: "hal9001" ;
>Sent: Thursday, May 31, 2001 11:45 AM
>Subject: Re: Manchester symbols [7:6655]
>
>
> > Manchester encoding is used on 10 Mbps Ethernet, Differential Manchester
> > encoding is used on token ring.
> >
> > Fred.
> >
> > hal9001 wrote:
> > >
> > > Something to do with Ethernet Encoding I fink...anyone else?
> > >
> > > Karl
> > > ----- Original Message -
> > > From: "g_study"
> > > To:
> > > Sent: Thursday, May 31, 2001 9:07 PM
> > > Subject: Manchester symbols [7:6655]
> > >
> > > > What are Manchester symbols?


Priscilla Oppenheimer
http://www.priscilla.com




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Re: Manchester symbols [7:6655]

2001-05-31 Thread hal9001

Thanx for that!

karl
- Original Message -
From: "Priscilla Oppenheimer" 
To: "hal9001" ; 
Sent: Friday, June 01, 2001 12:05 AM
Subject: Re: Manchester symbols [7:6655]


> The original 10-Mbps Ethernet II and 802.3 standards use Manchester
> encoding for all media types. Manchester encoding specifies that a bit
> period is divided into two equal intervals and there is always a
transition
> from either high to low or low to high in the middle of the bit period. A
> binary zero is high first and then low. A binary one is low first and then
> high. I haven't heard these called symbols, but perhaps your reference
> calls them symbols.
>
> Priscilla
>
>
> At 07:09 PM 5/31/01, hal9001 wrote:
> >Thanx for that any idea about the symbols?
> >
> >Karl
> >- Original Message -
> >From: "Fred Ingham"
> >To: "hal9001" ;
> >Sent: Thursday, May 31, 2001 11:45 AM
> >Subject: Re: Manchester symbols [7:6655]
> >
> >
> > > Manchester encoding is used on 10 Mbps Ethernet, Differential
Manchester
> > > encoding is used on token ring.
> > >
> > > Fred.
> > >
> > > hal9001 wrote:
> > > >
> > > > Something to do with Ethernet Encoding I fink...anyone else?
> > > >
> > > > Karl
> > > > - Original Message -
> > > > From: "g_study"
> > > > To:
> > > > Sent: Thursday, May 31, 2001 9:07 PM
> > > > Subject: Manchester symbols [7:6655]
> > > >
> > > > > What are Manchester symbols?
> 
>
> Priscilla Oppenheimer
> http://www.priscilla.com




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Re: Manchester symbols [7:6655]

2001-06-01 Thread garrett allen

i remember the term symbol as equated to a state change.  in modulation
techniques where
1 symbol = 1 bit, the symbol rate and the bit rate are the same.  some
modulation
techniques can yield multiple bits from a single symbol.  qpsk (quaternary
phase shift
keying) is a form of phase angle modulation used in rf where 1 symbol = 2
data bits.  so
the symbol rate is 1/2 the bit rate (23 megasymbols per second = 46mbps).



Priscilla Oppenheimer wrote:

> The original 10-Mbps Ethernet II and 802.3 standards use Manchester
> encoding for all media types. Manchester encoding specifies that a bit
> period is divided into two equal intervals and there is always a transition
> from either high to low or low to high in the middle of the bit period. A
> binary zero is high first and then low. A binary one is low first and then
> high. I haven't heard these called symbols, but perhaps your reference
> calls them symbols.
>
> Priscilla
>
> At 07:09 PM 5/31/01, hal9001 wrote:
> >Thanx for that any idea about the symbols?
> >
> >Karl
> >- Original Message -
> >From: "Fred Ingham"
> >To: "hal9001" ;
> >Sent: Thursday, May 31, 2001 11:45 AM
> >Subject: Re: Manchester symbols [7:6655]
> >
> >
> > > Manchester encoding is used on 10 Mbps Ethernet, Differential
Manchester
> > > encoding is used on token ring.
> > >
> > > Fred.
> > >
> > > hal9001 wrote:
> > > >
> > > > Something to do with Ethernet Encoding I fink...anyone else?
> > > >
> > > > Karl
> > > > - Original Message -
> > > > From: "g_study"
> > > > To:
> > > > Sent: Thursday, May 31, 2001 9:07 PM
> > > > Subject: Manchester symbols [7:6655]
> > > >
> > > > > What are Manchester symbols?
> 
>
> Priscilla Oppenheimer
> http://www.priscilla.com




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